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Synthesis of Higher Alcohols from Syngas over Alkali Promoted K-Co-Mo Catalysts Supported on Multi-walled Carbon Nanotubes
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作者 姬丽丽 李欢 +4 位作者 张伟 孙松 高琛 鲍骏 马运生 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第3期333-338,I0002,共7页
A series of carbon nanotubes-supported K-Co-Mo catalysts were prepared by a sol-gel method combined with incipient wetness impregnation. The catalyst structures were characterized by X-ray diffraction, N2 adsorption-d... A series of carbon nanotubes-supported K-Co-Mo catalysts were prepared by a sol-gel method combined with incipient wetness impregnation. The catalyst structures were characterized by X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy and H2-TPD, and its catalytic performance toward the synthesis of higher alcohols from syngas was investigated. The as-prepared catalyst particles had a low crystallization degree and high dispersion on the outer and inner surface of CNTs. The uniform mesoporous structure of CNTs increased the diffusion rate of reactants and products, thus promoting the reaction conversion. Furthermore, the incorporation of CNTs support led to a high capability of hydrogen absorption and spillover and promoted the formation of alkyl group, which served as the key intermediate for the alcohol formation and carbon chain growth. Benefiting from these characteristics, the CNTs supported Mo-based catalyst showed the excellent catalytic performance for the higher alcohols synthesis as compared to the unsupported catalyst and activated carbon supported catalyst. 展开更多
关键词 CO hydrogenation Higher alcohol synthesis Mo-based catalyst CNTs support
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Effects of Activation Atmospheres on Structure and Activity of Mo-based Catalyst for Synthesis of Higher Alcohols
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作者 周纪龙 谢威 +4 位作者 孙松 姬丽丽 郑黎荣 高琛 鲍骏 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第4期467-473,I0002,共8页
Activated carbon supported Mo-based catalysts were prepared and reduced under different activation atmospheres, including pure H2, syngas (H2/CO=2/1), and pure CO. The cat- alysts structures were characterized by X-... Activated carbon supported Mo-based catalysts were prepared and reduced under different activation atmospheres, including pure H2, syngas (H2/CO=2/1), and pure CO. The cat- alysts structures were characterized by X-ray diffraction , X-ray absorption fine structure, and in situ diffuse reflectance infrared Fourier transform spectroscopy. The catalytic per- formance for the higher alcohol synthesis from syngas was tested. The pure H2 treatment showed a high reduction capacity. The presence of a large amount of metallic CoO and low valence state Mo^φ+ (0〈φ〈2) on the surface suggested a super activity for the CO dissoci- ation and hydrogenation, which promoted hydrocarbons formation and reduced the alcohol selectivity. In contrast, the pure CO-reduced catalyst had a low reduction degree. The Mo and Co species at the catalyst mainly existed in the form of Mo^4+ and Co^2+. The syngas- reduced catalyst showed the highest activity and selectivity for the higher alcohols synthesis. We suggest that the syngas treatment had an appropriate reduction capacity that is between those of pure H2 and pure CO and led to the coexistence of multivalent Co species as well as the enrichment of Mo~+ on the catalyst's surface. The synergistic effects between these active species provided a better cooperativity and equilibrium between the CO dissociation, hydrogenation and CO insertion and thus contributed beneficially to the formation of higher alcohols. 展开更多
关键词 Higher alcohol synthesis Activation mechanism in situ diffuse reflectance infrared Fourier transform spectroscopy Mo-based catalyst SYNGAS
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Effect of elemental molar ratio on the synthesis of higher alcohols over Co-promoted alkali-modified Mo_2C catalysts supported on CNTs 被引量:2
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作者 Rohollah M.Kiai Tahereh Nematian +1 位作者 Ahmad Tavasoli Ali Karimi 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2015年第3期278-284,共7页
A series of molybdenum carbide catalysts promoted by potassium and cobalt,supported on carbon nanotubes(CNTs) were prepared by carbothermal hydrogen reduction method using CNTs as a carbon precursor.Firstly,molybden... A series of molybdenum carbide catalysts promoted by potassium and cobalt,supported on carbon nanotubes(CNTs) were prepared by carbothermal hydrogen reduction method using CNTs as a carbon precursor.Firstly,molybdenum and cobalt were loaded by co-precipitation method,and then potassium and additional molybdenum were impregnated to previous resultant.Different Mo/Co and K/Co molar ratio were used in catalyst synthesis.All the catalysts were characterized by ICP,BET,TEM,TPR,XRD and XPS,and the catalysts performances for higher alcohols synthesis(HAS) were investigated in a fixed-bed micro-reactor.The maximum selectivity to higher alcohols(C2+OH) was obtained at Mo/Co and K/Mo molar ratios of 1.66 and 0.6,respectively.XRD results confirmed the formation of K-Mo-C site and Co3Mo3 C phase that might play important role in producing C2+OH. 展开更多
关键词 β-Mo2C POTASSIUM cobalt K-Co-β-Mo2C nanocatalyst mixed alcohols synthesis
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Synthesis of Nitrogen-doped Titania by Solvothermal Reactions in Alcohols 被引量:1
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作者 Tsugio Sato Yohei Aida +1 位作者 Masakazu Komatsu 殷澍 《过程工程学报》 CAS CSCD 北大核心 2006年第3期472-476,共5页
关键词 nitrogen-doped titania solvothermal synthesis alcohol PHOTOCATALYSIS nitrogen monoxide DECOMPOSITION
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Cold plasma-activated Cu-Co catalysts with CN vacancies for enhancing CO_(2)electroreduction to low-carbon alcohol 被引量:1
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作者 Junyi Peng Qiang Zhang +3 位作者 Yang Zhou Xiaohui Yang Fang Guo Junqiang Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第10期108-115,I0005,共9页
Electrocatalytic CO_(2)reduction reaction to low-carbon alcohol is a challenging task,especially high selectivity for ethanol,which is mainly limited by the regulation of reaction intermediates and subsequent C–C cou... Electrocatalytic CO_(2)reduction reaction to low-carbon alcohol is a challenging task,especially high selectivity for ethanol,which is mainly limited by the regulation of reaction intermediates and subsequent C–C coupling.A Cu-Co bimetallic catalyst with CN vacancies is successfully developed by H_(2)cold plasma toward a high-efficiency CO_(2)RR into low-carbon alcohol.The Cu-Co PBA-V_(CN)(Prussian blue analogues with CN vacancies)electrocatalyst yields methanol and ethanol as major products with a total low-carbon alcohol FE of 83.8%(methanol:39.2%,ethanol:44.6%)at-0.9 V vs.RHE,excellent durability(100 h)and a small onset potential of-0.21 V.ATR-SEIRAS(attenuated total internal reflection surface enhanced infrared absorption spectroscopy)and DFT(density functional theory)reveal that the steric hindrance of V_(CN)can enhance the CO generation from*COOH,and the C–C coupling can also be increased by CO spillover on uniformly dispersed Cu atoms.This work provides a strategy for the design and preparation of electrocatalysts for CO_(2)RR into low-carbon alcohol products and highlights the impact of catalyst steric hindrance to catalytic performance. 展开更多
关键词 Cold plasma CN vacancies Steric hindrance Bimetallic catalyst low-carbon alcohol
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Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C_(2+)OH 被引量:12
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作者 Zhenghong Bao Kang Xiao +5 位作者 Xingzhen Qi Xinxing Wang Liangshu Zhong Kegong Fang Minggui Lin Yuhan Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第1期107-113,共7页
Cu-Fe composite oxides were prepared by co-precipitation method and tested for higher alcohol synthesis from syngas. The selectivity to C2+OH and C6+OH in alcohol distribution was very high while the methane product... Cu-Fe composite oxides were prepared by co-precipitation method and tested for higher alcohol synthesis from syngas. The selectivity to C2+OH and C6+OH in alcohol distribution was very high while the methane product fraction in hydrocarbon distribution was rather low, demonstrating a promising potential in higher alcohols synthesis from syngas. The distribution of alcohols and hydrocarbons approximately obeyed Anderson-Schulz-Flory distribution with similar chain growth probability, indicating alcohols and hydrocarbons derived from the same intermediates. The effects of Cu/Fe molar ratio, reaction temperature and gas hourly space velocity (GHSV) on catalytic performance were studied in detail. The sample with a Cu/Fe molar ratio of 10/1 exhibited the best catalytic performance. Higher reaction temperature accelerated water-gas-shift reaction and led to lower total alcohols selectivity. GHSV showed great effect on catalytic performance and higher GHSV increased the total alcohol selectivity, indicating there existed visible dehydration reaction of alcohol into hydrocarbon. 展开更多
关键词 higher alcohol synthesis SYNGAS Cu-Fe composite oxides molar ratio GHSV
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Cu-Co bi-metal catalyst prepared by perovskite CuO/LaCoO_3 used for higher alcohol synthesis from syngas 被引量:5
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作者 Yuzhen Fang Yuan Liu +1 位作者 Wei Deng Junhai Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第4期527-534,共8页
Cu-Co bi-metal catalysts derived from CuO/LaCoO3 perovskite structure were prepared by one-step citrate complexing method, and the structure evolution reaction from CuO/LaCoO3 to Cu-Co2C/La202CO3 under 1-12 pretreatme... Cu-Co bi-metal catalysts derived from CuO/LaCoO3 perovskite structure were prepared by one-step citrate complexing method, and the structure evolution reaction from CuO/LaCoO3 to Cu-Co2C/La202CO3 under 1-12 pretreatment was investigated by techniques of XRD, TPR and TEM. The results suggest that a much higher dispersion of copper significantly enhanced the reduction of cobalt, and a stronger interaction between copper and cobalt ions in LaCoO3 particles led to the formation of bi-metallic Cu-Co particles in the reduced catalysts and the enrichment of Co on the surface of bimetallic particles. The prepared catalysts were highly active and selective for the alcohol synthesis from syngas due to the presence of copper-modified C02C species. 展开更多
关键词 PEROVSKITE bi-metal higher alcohols synthesis CU-CO SYNGAS
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Nanosheet-structured K–Co–MoS_2 catalyst for the higher alcohol synthesis from syngas: Synthesis and activation 被引量:5
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作者 Huan Li Wei Zhang +4 位作者 Yinyin Wang Meiling Shui Song Sun Jun Bao Chen Gao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第3期57-62,共6页
The nanosheets structured K–Co–MoS_2 catalyst was prepared through a one-step hydrothermal synthesis combined with the wetness impregnation. The fresh catalyst has a high dispersion of Co–Mo–S active phase and no ... The nanosheets structured K–Co–MoS_2 catalyst was prepared through a one-step hydrothermal synthesis combined with the wetness impregnation. The fresh catalyst has a high dispersion of Co–Mo–S active phase and no Co_9S_8 is found. The pure H_2 activated catalyst shows a higher intrinsic activity, especially the C_(2+) OH selectivity for the higher alcohol synthesis compared to the one activated by 5% H_2/N_2 atmosphere. The reason is attributed to that the pure H_2 activation more effectively suppresses the formation of Co_9S_8 and stabilizes the Co–Mo–S active phase during the reaction due to the formation of SH species. 展开更多
关键词 SYNGAS Higher alcohol synthesis Mo-based CATALYST Co–Mo–S phase
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Synthesis and Diffuse Reflectance Spectrum of Open-framework Cobalt Phosphate DAF-2 From Alcoholic System 被引量:1
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作者 YU Ji-hong CHEN Jie-sheng and XU Ru-ren(Key Laboratory of Inorganic Hydrothermal Synthesis,Department of Chemistry,Jilin University,Changchun,130023) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1996年第4期390-392,共3页
SynthesisandDiffuseReflectanceSpectrumofOpen-frameworkCobaltPhosphateDAF-2FromAlcoholicSystemYUJi-hong;CHENJ... SynthesisandDiffuseReflectanceSpectrumofOpen-frameworkCobaltPhosphateDAF-2FromAlcoholicSystemYUJi-hong;CHENJie-shengandXURu-r... 展开更多
关键词 s:synthesis Cobalt phosphate alcoholic system Diffuse reflectance Spectroscopy
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On the role of cobalt carbidization in higher alcohol synthesis over hydrotalcite-based Co-Cu catalysts 被引量:1
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作者 Janine Nebel Stefan Schmidt +3 位作者 Qiushi Pan Katrin Lotz Stefan Kaluza Martin Muhler 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第11期1731-1740,共10页
Co-Cu-based catalysts are widely applied in higher alcohol synthesis (HAS) from synthesis gas. Although the nature of the active sites is still not fully understood, the formation of Co2C under HAS conditions seems to... Co-Cu-based catalysts are widely applied in higher alcohol synthesis (HAS) from synthesis gas. Although the nature of the active sites is still not fully understood, the formation of Co2C under HAS conditions seems to play a major role. A CO pretreatment procedure was developed allowing a systematic investigation of the influence of cobalt carbidization on the structural properties and catalytic performance of the catalysts. By exposing the catalyst to a CO-containing atmosphere prior to HAS, Co enrichment of the catalyst surface occurred followed by carbide formation. This surface modification decreased the formation of hydrocarbons and enhanced the formation of C2+OH. The catalyst pretreated with CO at 20 bar achieved the highest selectivity to ethanol and the lowest hydrocarbon selectivity. 展开更多
关键词 Higher alcohol synthesis Co-Cu catalyst Co_(2)C CO pretreatment
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Practical synthesis allenyl and homopropargyl alcohol through Cp_2TiCl_2 -Mg with propargyl alcohol derivatives 被引量:1
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《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期291-291,共1页
Reaction of Cp2TiCl2-Mg synthetic equivalent of practical Ti(II) reagent with propargyl alcohol derivatives affords allenyl titanium compounds in good yields.thus, providing an efficient and practical methods for synt... Reaction of Cp2TiCl2-Mg synthetic equivalent of practical Ti(II) reagent with propargyl alcohol derivatives affords allenyl titanium compounds in good yields.thus, providing an efficient and practical methods for synthesis of both allenyl and homopropargyl alcohols by the successive treatment with aldehydes and ketones. 展开更多
关键词 Mg with propargyl alcohol derivatives Practical synthesis allenyl and homopropargyl alcohol through Cp2TiCl2
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mi R-192-5p regulates lipid synthesis in non-alcoholic fatty liver disease through SCD-1 被引量:10
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作者 Xiao-Lin Liu Hai-Xia Cao +7 位作者 Bao-Can Wang Feng-Zhi Xin Rui-Nan Zhang Da Zhou Rui-Xu Yang Ze-Hua Zhao Qin Pan Jian-Gao Fan 《World Journal of Gastroenterology》 SCIE CAS 2017年第46期8140-8151,共12页
AIM To evaluate the levels of mi R-192-5 p in non-alcoholic fatty liver disease(NAFLD) models and demonstrate the role of mi R-192-5 p in lipid accumulation. METHODS Thirty Sprague Dawley rats were randomly divided in... AIM To evaluate the levels of mi R-192-5 p in non-alcoholic fatty liver disease(NAFLD) models and demonstrate the role of mi R-192-5 p in lipid accumulation. METHODS Thirty Sprague Dawley rats were randomly divided into three groups, which were given a standard diet, a high-fat diet(HFD), and an HFD with injection of liraglutide. At the end of 16 weeks, hepatic mi R-192-5 p and stearoyl-Co A desaturase 1(SCD-1) levels were measured. Mi R-192-5 p mimic and inhibitor and SCD-1 si RNA were transfected into Huh7 cells exposed to palmitic acid(PA). Lipid accumulation was evaluated by oil red O staining and triglyceride assays. Direct interaction was validated by dual-luciferase reporter gene assays.RESULTS The HFD rats showed a 0.46-fold decrease and a 3.5-fold increase in hepatic mi R-192-5 p and SCD-1 protein levels compared with controls, respectively, which could be reversed after disease remission by liraglutide injection(P < 0.01). The Huh7 cells exposed to PA also showed down-regulation and up-regulation of mi R-192-5 p and SCD-1 protein levels, respectively(P < 0.01). Transfection with mi R-192-5 p mimic and inhibitor in Huh7 cells induced dramatic repression and promotion of SCD-1 protein levels, respectively(P < 0.01). Luciferase activity was suppressed and enhanced by mi R-192-5 p mimic and inhibitor, respectively, in wild-type SCD-1(P < 0.01) but not in mutant SCD-1. Mi R-192-5 p overexpression reduced lipid accumulation significantly in PA-treated Huh7 cells, and SCD-1 si RNA transfection abrogated the lipid deposition aggravated by mi R-192-5 p inhibitor(P < 0.01).CONCLUSION This study demonstrates that mi R-192-5 p has a negative regulatory role in lipid synthesis, which is mediated through its direct regulation of SCD-1. 展开更多
关键词 mi R-192-5p Stearoyl-Co A desaturase 1 High fat diet Lipid synthesis Non-alcoholic fatty liver disease
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Enantioselective Synthesis of Chiral 1-Ferrocenyl Alcohol via CBS-Reduction
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作者 Chen, WY Lu, J +1 位作者 Zhang, YW Shen, ZX 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第12期1079-1080,共2页
Reduction of prochiral ferrocenyl ketones 2a-e in the presence of 10 mol% of chiral beta -amino alcohols 4a-b provides 1-ferrocenyl alcohols 1a-e in high yields (> 85%) with high optically purity (e.e. up to 96%).
关键词 beta-amino alcohol CHIRAL FERROCENE enantioselective synthesis BORANE
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Synthesis of Cytotoxic Sinapyl Alcohol Derivatives fromLigularia nelumbifolia
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作者 Yu ZHAO Wei LU +2 位作者 Xiao Jiang HAO Jun Chao CAI Hong YU 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第3期201-204,共4页
Total synthesis of two cytotoxic natural products, nelumol A (1) and nelumal A (2), were carried out by two different paths. 4-O-Benzyl substitute analogues 26 and 27, as well as the 4-O-(2-methyl-butenyl) derivative... Total synthesis of two cytotoxic natural products, nelumol A (1) and nelumal A (2), were carried out by two different paths. 4-O-Benzyl substitute analogues 26 and 27, as well as the 4-O-(2-methyl-butenyl) derivatives 29 and 30 were also synthesized for a SAR investigation. 1 and 2 were also measured on different tumor cell line. 展开更多
关键词 Natural products CYTOTOXICITY total synthesis SAR pharmaceutical chemistry sinapyl alcohol derivatives.
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Bifunctionality of Cu/ZnO catalysts for alcohol-assisted low-temperature methanol synthesis from syngas:Effect of copper content 被引量:1
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作者 Ilho Kim Gihoon Lee +2 位作者 Heondo Jeong Jong Ho Park Ji Chul Jung 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2017年第3期373-379,共7页
Alcohol-assisted low-temperature methanol synthesis was conducted over Cu/ZnO;catalysts while varying the copper content(X). Unlike conventional methanol synthesis, ethanol acted as both solvent and reaction interme... Alcohol-assisted low-temperature methanol synthesis was conducted over Cu/ZnO;catalysts while varying the copper content(X). Unlike conventional methanol synthesis, ethanol acted as both solvent and reaction intermediate in this reaction, creating a different reaction pathway. The formation of crystalline phases and characteristic morphology of the co-precipitated precursors during the co-precipitation step were important factors in obtaining an efficient Cu/ZnO catalyst with a high dispersion of metallic copper,which is one of the main active sites for methanol synthesis. The acidic properties of the Cu/ZnO catalyst were also revealed as important factors, since alcohol esterification is considered the rate-limiting step in alcohol-assisted low-temperature methanol synthesis. As a consequence, bifunctionality of the Cu/ZnO catalyst such as metallic copper and acidic properties was required for this reaction. In this respect, the copper content(X) strongly affected the catalytic activity of the Cu/ZnO;catalysts, and accordingly, the Cu/ZnO;.5 catalyst with a high copper dispersion and sufficient acid sites exhibited the best catalytic performance in this reaction. 展开更多
关键词 Low-temperature methanol synthesis alcohol-assisted Bifunctionality Cu/ZnO catalysts Copper content
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Polystyrene-supported Selenides and Selenoxide: Versatile Routes to Synthesize Allylic Alcohols
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作者 WeiMingXU YouChuZHANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第8期797-799,共3页
Several polystyrene-supported selenides and selenoxide have been prepared firstly. These novel reagents were treated with LDA to produce selenium stabilized carbanions, which reacted with aldehydes and alkyl halides, ... Several polystyrene-supported selenides and selenoxide have been prepared firstly. These novel reagents were treated with LDA to produce selenium stabilized carbanions, which reacted with aldehydes and alkyl halides, followed by selenoxide syn-elimination and [2,3] sigmatropic rearrangement respectively to give Z-allylic alcohols stereoselectively. 展开更多
关键词 Solid phase synthesis selenides and selenoxide allylic alcohol.
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First Total Synthesis of (-)-4-O-(6'-hydroxy-7'(9')-dehydro-6',7'-dihydrogeranyl)-coniferyl Alcohol
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作者 Zuo Sheng LIU Chu Sheng HUANG +1 位作者 Jiong LAN Yu Lin LI(National Laboratory of Applied Organic Chemistry and Institute of Organic Chemistry,Lanzhou University, Lanzhou, 730000) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第8期717-720,共4页
The reduction of 2,3-epoxy alcohol, prepared from the Sharpless asymmetric epoxidation, with the system of Ph3P, iodine, iwhdazole, 2,6-lutidine and water in Et2O/CH3CN,gives a chiral secondary allylic alcohol in 94% ... The reduction of 2,3-epoxy alcohol, prepared from the Sharpless asymmetric epoxidation, with the system of Ph3P, iodine, iwhdazole, 2,6-lutidine and water in Et2O/CH3CN,gives a chiral secondary allylic alcohol in 94% yield and 92% e.e.. Using this reaction as the key step, we synthesized (-)-coniferyl alcohol derivative 1 steding from the geraniol through nine steps in an overall yield of 39%. 展开更多
关键词 coniferyl alcohol synthesis
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Clay-Supported Molybdenum-Based Catalysts for Higher Alcohol Synthesis from Syngas
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作者 Gai-mei Wu Ji-long Zhou +4 位作者 Mei-mei Lv Wei Xie Song Sun Chen Gao Wen-dong Wang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第5期-,共7页
关键词 Higher alcohol synthesis Clay support K-Co-Mo catalyst SYNGAS
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Synthesis of Novel δ-amino alcohol ligands derived from Isosorbide and Isomannide
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《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期188-188,共1页
关键词 amino alcohol ligands derived from Isosorbide and Isomannide synthesis of Novel
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Synthesis of tetrahedrally coordinated CoO for higher alcohol synthesis directly from syngas
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作者 Zhuoshi Li Han Yang +5 位作者 Xiaofeng Pei Jiahui Li Jing Lv Shouying Huang Yue Wang Xinbin Ma 《Frontiers of Chemical Science and Engineering》 SCIE EI CSCD 2024年第8期99-109,共11页
Higher alcohol synthesis directly from syngas is highly desirable as one of the efficient non-petroleum energy conversion routes.Co0–Co^(O)catalysts showed great potential for this reaction,but the alcohol selectivit... Higher alcohol synthesis directly from syngas is highly desirable as one of the efficient non-petroleum energy conversion routes.Co0–Co^(O)catalysts showed great potential for this reaction,but the alcohol selectivity still needs to be improved and the crystal structure effect of Co^(O)on catalytic behaviors lacks investigation.Here,a series of tetrahedrally coordinated Co^(O)polymorphs were prepared by a thermal decomposition method,which consisted of wurtzite CoO and zinc blende CoO with varied contents.After diluting with SiO_(2),the catalyst showed excellent performance for higher alcohol synthesis with ROH selectivity of 45.8%and higher alcohol distribution of 84.1 wt%under the CO conversion of 38.0%.With increasing the content of wurtzite CoO,the Co^(0)/Co^(2+)ratio gradually increased in the spent catalysts,while the proportion of highly active hexagonal close packed cobalt in Co^(0)decreased,leading to first decreased then increased CO conversion.Moreover,the higher content of zinc blende CoO in fresh catalyst facilitated the retention of more Co^(2+)sites in spent catalysts,promoting the ROH selectivity but slightly decreasing the distribution of higher alcohols.The catalyst with 40%wurtzite CoO obtained the optimal performance with a space time yield toward higher alcohols of 7.9 mmol·gcat^(-1)·h^(-1). 展开更多
关键词 higher alcohol synthesis CO hydrogenation wurtzite CoO zinc blende CoO hexagonal-closest-packed Co
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